Toshiba STRATA DK24 Manual page 19

STRATADK
GENERALDESCRIPTION
DECEMBER1990
FlGURE14-EXTERNALSPEAKER(HESB)
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Amplified Talkback Speaker: When used
in conjunction with external page, an
HESB can be installed as a talkback
device. The HESB is connected to the
door phone, which is used as a micro-
phone to provide talkback capability.
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Loud Ringing Bell: Allows the voice/tone
of a paging/ringing call to any digital tele-
phone or 6500-series electronic tele-
phone to be amplified. When an HESB is
connected as a loud ringing bell, an
HHEU upgrade assembly must be
installed in the digital or electronic tele-
phone's base. See the loud ringing
bell/headset telephone upgrade in the last
section. An external speaker cable
(HESC-65 for electronic telephones;
HESC-65A for digital telephones) con-
nects the station to the speaker.
TABLEE
STATION LOOPREQUIREMENTS
Device Description
Max Loop Resistance
Max Distance from
Number of
(Including Device) KSU to Device Wire Pairs'
PEKU
(ckts 1 - 8)
Electronic
telephone,
400hms
iOOOft.(303m)
All need
2-pair.
PLJ'
door phone/
EKTs which
control boxes
receive OCA
(ckts 5 w 8)
calls need
PEKU
3-pair!
(ckts 7 & 8)
DSS consoles
200hms
500ft.(152 m)
PSTU Standard
Approx. 3000 ft. (909 m)
(ckts 1 m 8) telephones,
with 150 ohm device. See
P&J 2
voice mail,
3000hms
manufacturer's product 1 -pair
auto attendant,
specifications for exact
(ckts 1 & 2) etc.
resistance of device.
PDKU
Digital
(ckts 1 w 8)
telephones
400hms lOOOfL(303m)
1
-pair
PDKU
(ckt 8)
DDSS consoles
200hms
lOOOfL(303m) 1 -pair
PDKU
Shares digital
(ckts 1 m 8)
PDIU-DI
400hms lOOOfL(303m) telephone
wire-pair?
PDKU
(ckts 1 * 8)
PDIU-DS
400hms lOOOfL(303m) 1
-pair3
NOTES:
1. Use 24 A WG twisted pairs.
2. PESU circuits 3 and 4 are not used.
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3. Two-pair or larger wire is required to achieve maximum range.
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